I planted bare root strawberries at 160ppm - 180ppm between three totes. Ppm's shot up to 230ppm -235ppm, then started to decrease to 220ppm. That's when I added more nutrients at two weeks from planting because they drunk a good amount of water and one of the leaves had a yellow spot putting ppm at 360ppm - 380ppm and that's when the burned tips and downward curl came. I've recently cleaned the reservoir and added fresh water & nutrients with ppm at 180 - 200 between the three totes. Each tote has 10 gallons of water. 1tsp of pro-tekt, .5tsp of grow, .5 tsp of foliage pro, .5 tsp of mag - pro. I use Dyna Grow nutrients.